Nox emission performance assessment on a perforated plate-implemented premixed ammonia-oxygen micro-combustion system

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dc.contributor.authorZhao D
dc.contributor.authorCai T
dc.contributor.authorBecker S
dc.contributor.authorWang B
dc.contributor.authortang A
dc.contributor.authorFu J
dc.contributor.authorHan L
dc.contributor.authorSun Y
dc.contributor.authorCao F
dc.date.accessioned2021-01-25T21:19:00Z
dc.date.available2021-01-25T21:19:00Z
dc.date.issued2020en
dc.date.updated2020-12-11T00:19:07Z
dc.description.abstractThe present work examines the NOx emission characteristics of a premixed micro-combustion system with a perforated plate implemented. For this, a three-dimensional (3D) computational model involving a detailed chemical-kinetic mechanism for ammonia-oxygen combustion in the micro-combustor is developed. The model is first validated with the experimental measurements available in the literature before conducting comprehensive analyses. It is found that implementing a perforated plate in the micro-combustion system creates a flow recirculation zone downstream characterized by a low flame temperature and combustion speed. Meanwhile, the conjugate heat transfer between the combustion products and the inner combustor walls is shown to play a key role in the NO generation by relocating the flame in the axial direction and thus changing the chemical reaction rate. Furthermore, the preferential diffusion caused by the variation in the mass diffusivity of different species and the two-dimensionality flow is identified to vary significantly in comparison with the case in the absence of the perforated plate, especially in the vicinity of the recirculation zone. This diffusion effect results in the considerable drop in the N/O atomic ratio, primarily due to the reduction and increase of O2 and H2O, together with less available N2, and consequently affecting the NO generation rate. This work confirms that the flow field, the conjugate heat transfer as well as the preferential diffusion effect could be regarded as the potential mechanisms leading to the NOx emission variation in the recirculation zones.en
dc.identifier.citationZhao D, Cai T, Becker S, Wang B, tang A, Fu J, Han L, Sun Y, Cao F (2020). Nox emission performance assessment on a perforated plate-implemented premixed ammonia-oxygen micro-combustion system. Chemical Engineering Journal.en
dc.identifier.doihttp://doi.org/10.1016/j.cej.2020.128033
dc.identifier.issn1385-8947
dc.identifier.urihttps://hdl.handle.net/10092/101524
dc.language.isoen
dc.rightsAll rights reserved unless otherwise stateden
dc.rights.urihttp://hdl.handle.net/10092/17651en
dc.subjectAmmoniaen
dc.subjectPerforated plateen
dc.subjectNOx emissionen
dc.subjectFlow fielden
dc.subjectConjugate heat transferen
dc.subjectPreferential diffusionen
dc.subject.anzsrc0904 Chemical Engineeringen
dc.subject.anzsrc0905 Civil Engineeringen
dc.subject.anzsrc0907 Environmental Engineeringen
dc.subject.anzsrcFields of Research::40 - Engineering::4004 - Chemical engineering::400402 - Chemical and thermal processes in energy and combustionen
dc.subject.anzsrcFields of Research::40 - Engineering::4011 - Environmental engineering::401102 - Environmentally sustainable engineeringen
dc.titleNox emission performance assessment on a perforated plate-implemented premixed ammonia-oxygen micro-combustion systemen
dc.typeJournal Articleen
uc.collegeFaculty of Engineering
uc.departmentMechanical Engineering
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